Needles for Singer Sewing, Embroidery, Serger and Industrial Machines, the hardest working 2” piece of steel in your sewing machine |
What does needle size #90 mean? The number classification of a needle refers to the diameter of the blade (#90 means .9mm in diameter). The larger the number, the larger the needle's diameter of the blade. Larger needles also have a larger eye making them ideal for thicker threads. If a thread moves through an eye that is too small for the diameter of the thread, the thread may heat up, skip stitches, shred or break.